Amphipathic polymer, magnetic micelle nano carrier formed by same and use of magnetic micelle nano carrier

The invention provides an amphipathic polymer having the structure represented by the formula (I). The invention also provides a magnetic micelle nano carrier formed by the amphiphilic polymer and a use thereof. The polymer has amphipathicity and includes a disulfur bond, so that the polymer also has a reducing sensitive characteristic, the preparation method is simple and the reaction conditions are mild. The polymer is used for preparation of the magnetic micelle nano carrier, can be used for loading drugs for delivery, and can respond to a reduction environment in tumor cells, so that the tumor targeted performance of the nano carrier is better.